Drilling performance on the 12 1/4'' section on Smørbukk and Smørbukk Sør in the period from year 1996 - 2014

• Main Author: Sivertsen, Siv Hanne
• Format: Master Thesis
• Language: English
• Published: University of Stavanger, Norway 2014
• Subjects: Statoil operation; Rushmore; average well reference; performance graphs; performance targets; NCS status; DBR; industriell økonomi; drilling performance; VDP::Social science: 200::Economics: 210::Economics: 212; Norwegian Sea
• Online Access: http://hdl.handle.net/11250/2367015

Master's thesis in Industrial economics The cost of drilling wells at the Norwegian Continental Shelf (NCS) has increased drastically. This is one of the focal points both in the media and for the operating companies when it comes to the future of the NCS. For Statoil it is crucial to disclose a reason for increased time consumption on drilling operations. To be able to achieve this, a quantitative breakdown and analysis of the operations on a drilling section must be performed. This thesis aims to identify and quantify the operations contributing to the diminished performance on the selected fields Smørbukk and Smørbukk Sør in the Norwegian Sea. The time period spans from year 1996 to 2014 and all the 58 12 ¼’’ sections drilled are included. The fraction of time spent on the 12 ¼’’ drilling section is somewhat above one third of the total time spent on all of the drilling sections. A higher efficiency in this drilling section will have a high impact on the cost effectiveness and the ability to deliver a well faster. The data set has been divided into two intervals, Interval 1 and Interval 2. This is due to a two year drilling break from year 2002 – 2004. Interval 1 is before the drilling break and interval 2 is after. It is difficult to identify exactly what is the reason for the increased amount of time spent on drilling wells. To be able to analyze the data all the operations in the 12 ¼’’ section were extracted from the drilling reporting system (DBR) and carefully categorized manually. The development of the drilling performance has been investigated and visualized utilizing several different approaches;  Displaying the average percentage time distribution on operations in both Interval 1 and Interval 2 by use of pie charts  Quantify the average change in the time distribution between the two intervals  Showing the change in the trend of the long time performance development for the total time period  Comparing the performance in the end of both intervals  Showing the learning and batch drilling ...